Kasen is a super eccentric/esoteric artist and patron. he's lived in Recolle for 15? ish years, has problems connecting with his brother, and with people in general. he's just not very good at being a Person who sees other People as anything other than artworks to be examined, so I imagine that's where the problems came up.

like I imagine it's flattering for anyone to be seen as a "muse" at first, but after awhile, yeah... gets old.